Chin portion of welding helmet visor



FIG. 1 is a front perspective view of a chin portion of a welding helmetvisor showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a left side view, the right side being a mirror image thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a bottom view thereof.

The details shown in broken lines form no part of the claimed design.

The ornamental design for a chin portion of welding helmet visor, asshown and described.